У вашего броузера проблема в совместимости с HTML5
Note: Works best on the original version of Undertale v1.0, in the newest patched verison v1.001 you have to perform a "frame perfect", which is 1 frame instead of 3 frames in the original.
In Undertale speedrunning, there is always a few skips and tricks you can pick up a long the way to improve your time. This one being the famous "Lab Skip" used to skip the complete dialog and action scene involving Mettaton and Alphys during your neutral/true pacifist speedrun.
Other Glitches below:
Rainbow Asriel Glitch: https://youtu.be/Gh7t7KlamtA
Doggo Attack Glitch: https://youtu.be/MSUNdvieH_w
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